Bimetallic systems intermetallic compounds

Thus, it would be expected that at least a small fraction of Ni-Cu intermetallic compound may be formed. In fact, theoretical studies carried out on Ni-Cu systems indicate that the formation of bimetallic Ni-Cu clusters with an important surface nickel enrichment is very likely [14]. Taking into account the peculiar characteristics of the starting oxide precursor, in which a very high interaction between Ni and Cu cations exists, and the TPR results, we suggest that the formation of some Ni-Cu bimetallic clusters in the Ni-Cu-Zn-Al system could be possible In other words, since the catalytic behaviour of the Ni-Zn-Al system is significantly modified by the addition of Cu, it is very likely that some kind of interaction between Ni and Cu exists. It is probable, then, that the Ni-Cu-Zn-Al catalyst is constituted by monometallic nickel and copper clusters strongly interacting, and/or bimetallic Ni-Cu clusters. 

Multicomponent metallic hydrogenation catalysts, based on intermetallic compounds (IMC) of rare-earth elements with nickel, copper, cobalt, and other bimetallic systems. Most studies were devoted to two structural systems LnMs and LnMs, where Ln = La, Sm, Gd, Ce, Pr, and Nd and M = Ni (see Klabunovskii, Konenko s group 183,251,252 Compaiison of LnNis catalysts with Ni catalysts supported on oxides of Ln, show higher activities of the IMC s and their hydrides in hydrogenation of propene (100°C, 1 bar), where LaNis proved to be the most active catalyst... 

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